Wrench



Aug. 4, 1931. BROWN 1,816,997

WRENCH Filed Jan. 20, 1930 1 N VEN TOR.

Patented Aug. 4, 1931 PATENT OFFICE GEORGE BROWN, or OAKLAND, CALIFORNIA WRENCH 7 Application filed January 20, 1930. Serial No. 421,993.

- The invention formingthe subject matter of this application relates to expansion or bushing wrenches.

When pipes aresecured in place, usually afpipe Wrench or the like is" employed for gripping the outer periphery of one end of the pipe, and forturning the same in the vdesired direction thereby to threadedly secure 'the pipe in position. When the pipe 10 is positioned withina .wall and the end thereof protrudes beyond the surface of the wall but a short distance or is rendered entirely inaccessible then it is impossible to grip the end of the pipe by means of' a pipe wrench, orthe like.' In such instances the plumber "uses anextension, such as a nipple, threaded on the end of the pipe and protruding' beyond the wall s'urjface to a suflicient distance to allow the gripping thereof 2 by the usual wrench, thus the pipe is manipulated through an extension temporarily attached'to the end thereof.

The primary object of the invention is the provision of a' wrench adapted to extend Within a wall or othercovering surface and to frictionally engage the inside-periphery of the end of a pipe disposed behind said surface, thereby allowing the gripping and turning of thepipe by atool disposed beyond the end of the pipe.

Another object of the invention is the pro vision of a wrench the gripping members "'or jaws of, which are capable of frictional engagement with the inner periphery of the *end of a pipe; said jaws are brought into said frictional engagement by being moved apart from each other on account of the .usual manipulation of the handles of the wrench; the insertion ofthe jaws into the 40 end of any. tubular member is rendered .pos-

sible by the extension of the jaws beyond *thesides of thehandles of the wrench; the

relative, position of the handles being adjustable seas to varythe spacing between i the grippingmembers or jaws, whereby the 'use of thewrench in connectionwith pipes "of different diameters is greatly facilitated.

c Other objects of the invention are 'to provide a device of the character described that willfbe superior in point of simplicity, in-

expensiveness of construction, positiveness of operation, and facility and convenience in use and general efficiency.

In this specification and the annexed drawings the invention is illustrated in the form considered to be the best, but it is to be understood that the invention is not limited to such form because it may be embodied in other forms; and it is also to be understood that in and by the claims following the description it is desired to cover the invention in whatsoever form it maybe embodied.

The invention is clearly illustrated in the accompanying drawings, wherein:

Figure 1 is a perspective view of my wrench. L

Figure 2 is a side elevation of the wrench showing the handles in disengaged position for the purpose of adjustment, and r 7 Figure 3 is a side elevation of the wrench, showing the same in engagement with the inner periphery of a pipe.

Referring to the accompanying drawings wherein similar reference characters designate similar parts throughout, the various figures described above adequately illustrate my invention and the following detailed de scription is commensurate with the above mentioned drawings in enabling an artisan to construct and assemble the constituent parts of the same. I

In carrying out my invention I make use of handles 6 and 7, one end of each handle is bent substantially at right angles to the longitudinal axes of the handles. The end of the handle 6, is bent in the direction of the handle 7, forming an arm 8; the end of the handle 7 is'bent away from the handle 6 and substantially in parallelism with the arm 8, so as to form an upwardly extending arm 9, as illustrated, in the drawings. v.The arm 9 is shorter than the arm 8 so that the upper ends of the arms are in alignment with each.

other, when the handles are in operative relation to each other.

On the free ends of the arms are formed transverse, gripping members 11, extending in parallelism with each other. The gripping members are of semicylindrical shape, 0

20 edg e of the'h andle 7 Theteethof the secthe fiat sides thereofjbeing opposite each other, so that when the gripping members are brought toward each other they form a cylinder. the grippingmembers 11 conform to the shape of'the inner periphery of a tubular material, such as a pipe 12, The endsof the cylindrical "sides of the gripping members arss'ermredasat 13, so"asto"form axially disposed teeth thereat'. When thearms are moved away from each pther to a-proper distance the said serrated ends firmly grip the inner periphery of the pipe 12, allowing the moving or turning of the pipe 12, by the proper maniptil ation of the handles Qand v v V v 'Theoperative connection between thehandles "'6 and 7""isim'e' ans 'fof teeth 1 4 on the upper edge of -';thejhandle '6 anchby sector 16f or'111'eidon"tli'e lower 1-4 Ine tia-51s hold the handles eel-1d =7 coactijiig relation,"with freedom ot'adjustment', "a sleeve 1'1 is provided, in the upper portion olfwhiCh is apivOtiIS for rotat'a'bly supportingthe handle ,7 at'an intermediate point thereof? The sleeve" 17 is slidableon the arm 6 a manner'lo' be presently set forth i The sleeve 17 is made of such a length as J to overhang below' thehandle 6 whenfuie sector 16 is inengagement with the t eeth 145- smael o-gripne p e 12" "f ping members 11 are inserted vinto 'tlie' pipe 12, whicf i insertion allows the gripping of the sea-6r, are i'pip' with r demi o f themaiiipulation oithe handlesb and 7 beyond'the end ofthe pipef1'2',outside'hifthe'"wall or other covering surface within whichtheipipe ispositifonecli The "free end "of, the handle 7 is thenjpfesse'd reward the 1 frefe fend 'of the handle 16;" caus ng the (handle 7 around, the pivot "18 thereof. The aforesaid pivotal ni'oveirient results the swinging of'the f9? away from the arm8',whereby the g'rippingfmeinber "11 thereon is moved awaylfronrtheicoinplemental gripping'imember ion the end of the varrnf8; I The outer cylindrical peripheries of the grip'ping members 1 1' are thus forced into firm, "f ri;ctional' engagement'with' the inner periphery of the pipe 12' and are held jlIl' such grinning position while'thehan'dle f'isjforced toward the han le 6., New by themanipula'tijon of the handles 6 and '7 in the usual manner, as a wrench, the pipe may turned er other'wise moved without the obstruction of; the handle movement, and without injury to theinner or outer periphery of the end oflthe'pip'e' 12. Such injury and difficulty of manipulatidn of the tool 'handles ar'e'attendant to the use of the tools heretofore femployedin-connection with pipes the ager which are inaccessible.

The outer curved surfaces of is slidon the lower handle 6 until the grip- ,pingfmember ,the arm 9 assumes the a ivotal' movement of Letters Patents is l In order to render the wrench adjustable to pipes of different inner diameters the toothed portion of the handle 6 is extended to a convenient length on the upper edge of the handle 6. The adjustment is accomplished by the raising of the upper handle 7 and the sleeve 17 therewith until the sector'is out ofengagementwith the t eeth 14:,

thenthe handle? and tliesleeve 17 therewith required spaced position relative theother gripping member.

, After the gripping members 11 are properlysp aced, thesec'tor 16 is allowed to drop 80 in. enga n p s io ith th (tee t le rposi' te thereto." the ripping members 11 ts inserted into the pe legal- 1 the pivotal movement of the 'hfajndlefi willforce e tperiph ryft dt p p an may be held in such "position by'holding" the ends or the handles 6' ;7 in the grip ing 'iiiacces'sl ble either on aediuiti of their w te 2 i "'a' ellfit "Q b'Q i g dismsed b hirid" such "obstruction; further Ye the each other- "and during the Ipivotal moyeinent 1 1 "Having thus described, ny invention what ase i cur 21 sector gear on said lfeveneccentnc to said 54 u a), M. :-m l-'' 1 "z-" p t a mp m ntary rlppmg memb j a id, i n ha ing? vrek' te t ad pted e T hses 'me it when see adaptedftp ieii ge the inner periphery/of an 2;. wrench comprising a pair of oppoi e y wash n eeie aew spectively toothed sector, said other lever being slid- -means cooperating between able in said yoke. and adapted to be engaged or disengaged from said toothed sect0r.--

3. A wrench comprising a pair of oppositely disposed cooperating semi-cylindrical internal jaws transversely disposed and intermediately integral with perpendicular portions of a pairof cooperating levers, one of said levers being pivotally mounted inthe upper end of a yoke and having formed on the under surface a toothed sector eccentric to said pivot, the other of said levers having formed in the top surface, a toothed rack adapted for engagement with said toothed sector, said other lever being slidable in said yoke.

4.- In combination, a toothed rack, formed on the inner longitudinal edge of a right angle bar, a semi-cylindrical jaw projecting transversely from both sides adjacent to the end of the slidably retained in a yoke, a toothed sector integral with a second right angle bar and disposed on the outer longitudinal edge, a semi-cylindrical jaw for projecting transversely from both sides adjacent to the end of the short leg thereof and adapted to cooperate with said first named semi-cylindrical jaw to form an inside gripping chuck, said second right angle bar being pivoted eccentrically of said toothed sector toward said jaw and within said yoke. I

5. In combination, a yoke, a right angle lever pivoted in said yoke, a second right angle lever slidable in said yoke, transverse inner periphery gripping jaws integral with the short'arms of said levers, and engaging said levers whereby a closing movement of the long arms of said levers causes a substantially longitudinal outward movement of said sec- 0nd right angle lever relative to said oke, said jaws projecting from both sides 0 said levers. T

In testimony whereof I have aflixed my signature.

, GEORGE BROWN.

short leg thereof, said bar being i 

